gpio/pca953x.c: Interrupt pin is active-low

The interrupt pin of the PCA953x is active low, and on the rising edge
no interrupt should be produced.
Signed-off-by: David Jander <david@protonic.nl>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>

drivers/gpio/pca953x.c

@@ -493,7 +493,6 @@ static int pca953x_irq_setup(struct pca953x_chip *chip,
 		ret = request_threaded_irq(client->irq,
 					   NULL,
 					   pca953x_irq_handler,
-					   IRQF_TRIGGER_RISING |
 					   IRQF_TRIGGER_FALLING | IRQF_ONESHOT,
 					   dev_name(&client->dev), chip);
 		if (ret) {